Check-valve.



.1. J. THELEN.

annex VALVE. APPLICATION FILED HA3. 2, 1912.

1,072,673. Patented Sept.9,1913.

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UNITED STA TES PATENT orrioa 33.003 ,3. runner, on scenarios-Apr, newurban, Assrenon or nun-nan Tfi Hm? e. uoarm, or scnsnneramz, new someBEEGK-VALYE.

Specification .0: am. new.

Patented Sept. a, 1913.

Application m d mqh 2,1512. seriam aarm. I

To all whom a may .cpncemlt Be it known that I, JAooB J. THELEN, a

citizen of the United States residing at- Schenectady, in th'e 'countyof Schenectady and State of New York, have invented certain new anduseful Improvements in Check- .A further object of the invention residesI in providing a device which is so constructed as to be readily takenapart for repairs or other purposes when desired.

With these and-other objects in view, my invention consistsinthe novelfeatures of construction, combination and arrangement of parts as willbe hereinafter referred to and more particularly pointed out thespecification and claim.

In the accompanying drawing forming a part ofthis application, Figure 1is a vertical section through the device; and' Fig. 2 is a horizontalsection therethrough, as seen on line 2-2 of Fig. 1.

In describing my invention, I shall refer to the drawing in whichsimilar reference characters designate corresponding parts throughoutthe several views and in which 1 indicates a valve body or casing havinthe inlet 2 provided in the bottom thereof a apted to receive a pipe,not shown, said casing or body being also rovide'd with a valve seat 3.A disk valve 4 is adaptedto be seated on the valve seat 3, said diskbeing formed.

integral with a stem or shank 5 extending above and below thesame. Thatportion of the stem or shank which extends below the diskis of a smallerdiameter than the upwardly extending portion of the shank and the sameis shdabl disposed through a guide sleeve 6 formed in a spider 7, whichis disposed in the inlet of the member 1 between the extreme lowerportion thereof and said valve seat 3. It will be observed that the seat3 is projected inwardly into the casing, thereby 'forming an annulartrough 3' surrounding said seat.

The upper portion of top of the casing or body 1 has an outlet opening 8therein the engagement the threaded lower portion of a unionor capmember 9, said member 9 being adapted to receive therein the end of apipe, not shown.- This union or cap member 9 has a spider or the like 10formed in the bottom thereof whichsupports an additional guide sleeve 11which is disposed in alinement with the guide sleeve 6 and adapted toreceive therethrough the upwardly projecting portion of the shank 5,formed on said valve. The valve therefor will be guided throughout itsmovementwhen raised and lowered.

As stated, the valve 4 is of disk-like formation, the upper face of the.same being somewhat convexed, while the bottom face of the same is fiatand provided with an a l of which ar thread d to re e n annular groove12 contiguous with the downwardly projecting portion of the shank 5. Anyback pressure whatsoever after the valve has been raised will cause thelatter to return to its effective position on the seat 3, and as theprojecting portions of the shank 5 are normally disposed through theguidingsleeves 6 and 11, it will be appreciated that said valve will' beguided throughout its movement.

is raised so that sediment will not collect thereon but will settlebelow the valve into said trough, and thus materially lessen resistanceto the flow past the valve.

From the foregoing, it will be seen that I have provided a check valvewhich is simple and durable in construction, inexpensive to manufacture,and one which is very eflicient in operation.

While I have particularly described the elements most well adaptedto'perform the functions set forth, it will be understood By. theprovision of the annulartrough 3, the valve seat that the invention iscapable of various changes and modifications within the scope of theappended claim.

.In order to limit the upward movement of the stem or shank 5 so as toprevent total displacement of the same when raised, a collar 12' isformed on the upwardly extending portion of said shank which is adapted.to abut the lower edge of the guide sleeve 11 when the disk). is raised.

Having thus described this invention, what is. claimed is 2-' i {Thehereindescribed check valve comprising a casing having inlet and outletports and a valve seat projecting into the casing around said inlet portand providing an annular trough surrounding said seat, a valve membercomprising a stem having a valve disk integrally formed thereon intermediate of its ends, said disk being of greater diameter than the valveseat to overhang said annular trough when engaged upon said seat, the.under surface of said valve disk being fiat and provided with anannular groove contiguous to the valve stem and of less diameter thanthe valve seat, the upper surface of said valve disk being convex, andmeans arranged in the inlet and outlet ports for guiding the valve stemin 15 its movement.

' Intestimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

JACOB J. THELEN. Witnesses:

E. S. VAss,

J. Lnsnm SorrooLonAF'r.

